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Project Overview sewers leakage control program, after Jiangsu Nantong municipal sewage treatment works completed renovation project of the main building, as the basis of non-uniform settlement and displacement, the cross joints (joints) sewer pipe parts of a large amount of leaking joints, so that construction can not be the next step, it is necessary to take immediate measures to quickly and effectively waterproof plugging the sewage pipeline project reaches the construction requirements leak to meet the next construction and use requirements. Second, the programming on the basis of a national standard GBJ108-87 "underground waterproof technical specifications" 2, the national standard GBJ208-83 "underground waterproof construction and acceptance of" 3, waterproof plugging project costing 4, "water works portfolio "5, the existing water projects nationwide fixed compilation 6, China Engineering Construction Standardization Association standard CECS117: 2000" reservoir was designed structures Deformation order "7, the national building materials industry standard JC483-92" polysulfide sealant "8, the Party of the technical quality and construction requirements Third, expansion joints (Deformation) leakage control program 1, expansion joint leakage of underground engineering analysis joints (Deformation) is easy to produce special parts water leakage, mainly because of leakage produced are the following aspects: (1) underground works deformation is too large, exceeding the allowable deformation range, mainly based on thermal expansion and contraction and uneven settlement. (2) the rapid displacement of sewers Deformation generated in the construction process, causing damage to the rubber water stop. (3) Since the density level not reached when pouring concrete, resulting in loose, doghole, cellular and other phenomena, the formation of a water leakage channel. (4) rubber water-cure is not complete, aged and ruptured after a long time, or in the construction of drill rod chisel is bad. Once the leaking joints, which indicates that the entire water stop failure, it is necessary to conduct a comprehensive whole perimeter of seam leakage control to be effective. 2, waterproof plugging scheme based on the leakage reason analysis, the program uses the first grouting waterproof plugging seal, sewage pipelines flexible protective polymer sealant, finally rigid protection measures, plugging specific program diagram is as follows: 1, grouting plugging Wang 2, PE foam strip (double) 3, rapid sealing agent mortar (thickness 40 ~ 50mm) 4, PG321 two-component polysulfide (thickness 20mm) 5, compression sealant 6, telescopic seam - side concrete waterproof plugging program are as follows: (1) removal of the grass-roots: the expansion joints and remove impurities in the original material to a predetermined depth (typically 7 ~ 10cm deep), rinse with water. (2) Fixed grouting channel and grouting pipe: mixing over 32.5 ordinary portland cement grouting channel -PE fixed foam strip with rapid plugging agent (liquid, powder may be), PE foam strip at a fixed time, each separated by a grouting pipe buried about 50cm. Grouting pipe using & Oslash; 10 ~ 13mm of pressure rubber hose, the pipe both as water pipes and as grouting works. (3) plugging grouting: grouting material Polymer injection started from the bottom - grouting plugging Wang, grouting pressure control between 0.3 ~ 0.5MPa, grouting to be next to a hole to stop oozing slurry grouting , close the valve, and then from another hole grouting, followed sequentially carried out until all leaks observed grouting is completed, there are still some places such as leakage can be replenished from a recent grouting hole until no leakage so far. (4) Cut grouting pipe: 24h after grouting confirm no leakage in the case, cut off all grouting pipe, with a torch drying interface. (5) Clean interface: with a wire brush to clean the skin of impurities and miscellaneous debris generated due blowtorch baking. (6) The construction of a flexible material: 50 ~ 60mm thick PG321 construction component polysulfide sealant in the joints, T-posted outside width 300mm, 20mm thick component polysulfide sealant. (7) The protective layer: After the polysulfide sealant cured sealant by compression as the last semi-rigid protective layer. Fourth, crack leakage control program according to the actual situation of the Party and engineering requirements, you first need to crack grouting waterproof plugging leakage area, then two-component polysulfide sealant for flexible sealing layer, compressive seal again agent, rigid waterproof protective layer construction. Rigid protection plus flexible waterproof waterproof plugging program is based on a national "underground waterproof technical specifications" of requirements. Waterproof plugging, structural reinforcement construction procedures are as follows: 1, first cutting a deep construction joints 70mm, width of 60mm "V" type joints, rinse with water. 2, the fixed grouting and grouting works fast channel blocking agent and the above 32.5 ordinary portland cement grouting channel fixed PE foam strip, at a fixed PE foam strip, every one grouting pipe buried about 50cm, Note slurry pipe using & Oslash; 10 ~ 13mm of pressure rubber hose, the tube has been used as water pipes and as grouting works. 3, sealing and grouting plugging waterproof construction polysulfide flexible seal from one side of the polymer grouting material injection started - grouting plugging Wang, grouting pressure control between 0.3 ~ 0.5MPa, to be next to a grouting hole can stop take slurry grouting, and then close the valve from another hole plugging grouting, followed by the order, until all leaks observed grouting is completed, there are still some places such as leakage from the recent A supplementary grouting hole until no leakage so far. Cut pipe before making PG321 component polysulfide sealant construction. 4, the protective layer of rigid construction When grouting waterproof plugging cracks will not produce leaks, but no increase structural strength, compressive sealant must be used with a variety of additives, agents, additives made a kinds of high-strength, low viscosity structural reinforcement material, when the material is cured and after so can produce structural strength of greater than C30 of the upper and lower concrete slab together into a whole, to achieve long-term overall objective. Fifth, a large area (cellular) leakage control program 1, the surface layer method: for large area leakage of water governance structures. Under normal circumstances, a large area of ??the basement seepage water governance can not be the positive side, only in the dorsal surface treatment, it is in the pre-construction should be carried out by drainage and to prevent the newly made waterproof surface layer is pressurized flush bad. Surface layer of concrete practice of law: Choose the amount of leakage centralized location, open hole borehole water flow from the catheter. According leaking water amount can be in one or more locations borehole water, can not find the leakage point, in the lower part of the wall of borehole water. Then watertight material according to the requirements of the site, a large area of ??applied polymer cement waterproof mortar, to be layered wiping pressure, order plain water slurry - waterproof mortar - Waterproof prime pulp, last dialed tube plugging. For concrete slight seepage, available compression sealant applied on the concrete surface with a scraper construction, general construction of 2 to 3 times, but not until the water film so far. For obvious leakage of water holes and cracks, holes and cracks leakage by water treatment method, one by one sealing process. For the structure of the surface concrete basement, water pressure in the smaller less severe slow leakage of water (such as sweating, Yin wet, etc.) available on the dorsal surface scraping anti-leakage grams, making the surface layer of impermeable cover layer impermeable to play the role. Specific practices: the primary surface treatment is smooth, rugged place filled with cement mortar, flatten trowel, while removing the grass surface dust, oil, etc., in order to facilitate the waterproof layer bonded firmly. After the work is completed and pass the inspection, you can use anti-leakage grams construction. 2, grouting method: case of a large area basement water leakage, grouting method of treatment may also be used, may be disposed of grouting holes in the structure according to water leakage case, distribution into a plum-shaped, triangular or a shape, then grouting process to form the internal structure of the water curtain. In addition, also a "closed surface grouting" approach, which is to water down the tube, followed by compression sealant large plaster, to be waterproof coating strength to meet the requirements, grouting to prevent water from water pipes. Six holes, point seepage, embedded parts, wall duct leakage control program (a) holes, point seepage leakage control method, plugging method: using an inorganic sealing material is directly blocked. Hole encountered a smaller or larger holes, but the water pressure is not the slow leakage of water, the inorganic waterproof plugging material can be directly plugged. Operating procedures: according to water leakage situation, find out the leakage point to leakage point as the center borehole (diameter of 1 ~ 3cm, depth of 2 ~ 5cm), hole wall surface perpendicular to the base as possible, and rinse with water, with the plugging material twisted into the shape similar to a cone with holes group shape, let it start to solidify at the rapid pressure inside the hole, and to holes in the wall around the extrusion dense material so that plugging holes in the wall closely, completed by plugging no water leakage check, you can use a polymer cement mortar pressed to the plate or wall flush. 2, under the control law: for large hole pressure gushing rapids or leakage of water. Specific practices are: the surface layer and the bonding Clear leaks hollowing false stones, then tick into the hole, depending on the depth of the water may be leaking. Spread a layer of gravel at the bottom of the cave, a layer of gravel cover and hole the same size as sheet metal or linoleum, and on which to open a small mouth, the hose into the hole so that water flowing along the pipe, and then use quick-setting materials The water pipes around the hole once filled, to be plugging material begins to solidify, forced to squeeze cement plugging holes around the dense clay surface and below the structure surface is not less than 1.5cm, complete blockage and no leakage of water after inspection After allocate hose, plug the perforations, and finally with a sealant layered compression plate surface wiping pressure to flush. Zhangjiakou sewers plugging specialized units